bevy/.github/workflows/docs.yml
SpecificProtagonist 5b0d898866
Trait tags on docs.rs (#17758)
# Objective

Bevy's ECS provides several core traits such as `Component`,
`SystemParam`, etc that determine where a type can be used. When reading
the docs, this currently requires scrolling down to and scanning the
"Trait Implementations" section. Make these core traits more visible.

## Solution

Add a color-coded labels below the type heading denoting the following
types:
- `Component`
  - immutable components are labeled as such
- `Resource`
- `Asset`
- `Event`
- `Plugin` & `PluginGroup`
- `ScheduleLabel` & `SystemSet`
- `SystemParam`

As docs.rs does not provide an option for post-processing the html,
these are added via JS with traits implementations being detected by
scanning the DOM. Rustdoc's html output is unstable, which could
potentially lead to this detection (or the adding of the labels) to
break, however it only needs to work when a new release is deployed and
falls back to the status quo of not displaying these labels.

Idea by JMS55, implementation by Jondolf (see
https://github.com/Jondolf/bevy_docs_extension_demo/).

## Testing

Run this in Bevy's root folder:
```bash
 RUSTDOCFLAGS="--html-after-content docs-rs/trait-tags.html --cfg docsrs_dep" RUSTFLAGS="--cfg docsrs_dep" cargo doc --no-deps -p <some_bevy_package>
```

---

## Showcase
Check it out on
[docs.rs](https://docs.rs/bevy_docs_extension_demo/0.1.1/bevy_docs_extension_demo/struct.TestAllTraits.html)

![trait
tags](https://github.com/user-attachments/assets/a30d8324-41fd-432a-8e49-6d475f143725)

## Release Notes

On docs.rs, Bevy now displays labels indicating which core traits a type
implements:
![trait tags
small](https://github.com/user-attachments/assets/c69b565f-e4bc-4277-9f6b-40830031077d)

If you want to add these to your own crate, check out [these
instructions](https://github.com/bevyengine/bevy/blob/main/docs-rs#3rd-party-crates).

---------

Co-authored-by: Joona Aalto <jondolf.dev@gmail.com>
Co-authored-by: Carter Weinberg <weinbergcarter@gmail.com>
2025-02-11 22:13:38 +00:00

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YAML

name: Deploy Docs
on:
push:
branches:
- 'main'
# Allows running the action manually.
workflow_dispatch:
env:
CARGO_TERM_COLOR: always
RUSTDOCFLAGS: --html-in-header header.html
# If nightly is breaking CI, modify this variable to target a specific nightly version.
NIGHTLY_TOOLCHAIN: nightly
# Sets the permissions to allow deploying to Github pages.
permissions:
contents: read
pages: write
id-token: write
# Only allow one deployment to run at a time, however it will not cancel in-progress runs.
concurrency:
group: "pages"
cancel-in-progress: false
jobs:
build-and-deploy:
runs-on: ubuntu-latest
# Only run this job when on the main Bevy repository. Without this, it would also run on forks
# where developers work on the main branch but have not enabled Github Pages.
if: ${{ github.repository == 'bevyengine/bevy' }}
environment:
name: github-pages
url: ${{ steps.deployment.outputs.page_url }}
steps:
- name: Checkout
uses: actions/checkout@v4
- uses: dtolnay/rust-toolchain@master
with:
toolchain: ${{ env.NIGHTLY_TOOLCHAIN }}
- name: Install Linux dependencies
uses: ./.github/actions/install-linux-deps
with:
wayland: true
xkb: true
# This does the following:
# - Replaces the docs icon with one that clearly denotes it's not the released package on crates.io
# - Adds a meta tag that forces Google not to index any page on the site.
- name: Pre-docs-build
run: |
sed -i.bak "s/icon.png/icon-docs-dev.png/" src/lib.rs
echo "<meta name=\"robots\" content=\"noindex\">" > header.html
- name: Build docs
env:
# needs to be in sync with [package.metadata.docs.rs]
RUSTFLAGS: --cfg docsrs_dep
RUSTDOCFLAGS: -Zunstable-options --cfg=docsrs --generate-link-to-definition --html-after-content docs-rs/trait-tags.html
run: |
cargo doc \
-Zunstable-options \
-Zrustdoc-scrape-examples \
--all-features \
--workspace \
--no-deps \
--document-private-items \
--exclude ci \
--exclude errors \
--exclude bevy_mobile_example \
--exclude build-wasm-example \
--exclude build-templated-pages \
--exclude example-showcase
# This adds the following:
# - A top level redirect to the bevy crate documentation
# - A CNAME file for redirecting the docs domain to the API reference
# - A robots.txt file to forbid any crawling of the site (to defer to the docs.rs site on search engines).
- name: Finalize documentation
run: |
echo "<meta http-equiv=\"refresh\" content=\"0; url=bevy/index.html\">" > target/doc/index.html
echo "dev-docs.bevyengine.org" > target/doc/CNAME
echo $'User-Agent: *\nDisallow: /' > target/doc/robots.txt
rm target/doc/.lock
- name: Upload site artifact
uses: actions/upload-pages-artifact@v3
with:
path: target/doc
- name: Deploy to Github Pages
id: deployment
uses: actions/deploy-pages@v4